National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Joliet Regional Airport (KJOT)

Lat: 41.52°NLon: 88.18°WElev: 572ft.

Fair

44°F

7°C

Humidity 100%
Wind Speed Calm
Barometer 30.26 in
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 5 Oct 5:15 am CDT
Extended Forecast for

Diamond IL

  • Today

    Today: Sunny, with a high near 71. Calm wind becoming north around 5 mph in the afternoon.

    High: 71 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 45. Northeast wind around 5 mph becoming southeast after midnight.

    Low: 45 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 76. South southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 76 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 56. South wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 56 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 78. Southwest wind 5 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 15 mph.

    High: 78 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 73.

    High: 73 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 71. Calm wind becoming north around 5 mph in the afternoon.
Tonight
Clear, with a low around 45. Northeast wind around 5 mph becoming southeast after midnight.
Tuesday
Sunny, with a high near 76. South southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 56. South wind 5 to 10 mph, with gusts as high as 15 mph.
Wednesday
Sunny, with a high near 78. Southwest wind 5 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 15 mph.
Wednesday Night
Partly cloudy, with a low around 50.
Thursday
Sunny, with a high near 73.
Thursday Night
Partly cloudy, with a low around 50.
Friday
Mostly sunny, with a high near 73.
Friday Night
Mostly clear, with a low around 50.
Saturday
Sunny, with a high near 77.
Saturday Night
Mostly clear, with a low around 56.
Sunday
Mostly sunny, with a high near 81.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Diamond IL
 41.29°N 88.24°W
Last Update:
3:56 am CDT Oct 5, 2026
Forecast Valid:
5am CDT Oct 5, 2026-6pm CDT Oct 11, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation